[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC

…		…
27	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
29	# endif	29	# endif
30	#endif	30	#endif
31		31
		32	#include <stdio.h>
32	#include <errno.h>	33	#include <errno.h>
33		34
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	36	# undef STACKGUARD
36	#endif	37	#endif
…		…
57	# else	58	# else
58	# define BOOT_PAGESIZE	59	# define BOOT_PAGESIZE
59	# endif	60	# endif
60	#endif	61	#endif
61		62
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64
65	/* The next macro should declare a variable stacklevel that contains and approximation	63	/* The next macro should declare a variable stacklevel that contains and approximation
66	* to the current C stack pointer. Its property is that it changes with each call	64	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
69		68
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		70
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	71	#define labs(l) ((l) >= 0 ? (l) : -(l))
73		72
74	#include "CoroAPI.h"	73	#include "CoroAPI.h"
		74
		75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		76
76	#ifdef USE_ITHREADS	77	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	78	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	83	# define UNLOCK (void)0
83	#endif	84	#endif
84		85
85	static struct CoroAPI coroapi;	86	static struct CoroAPI coroapi;
86	static AV main_mainstack; / used to differentiate between $main and others */	87	static AV main_mainstack; / used to differentiate between $main and others */
87	static HV *coro_state_stash;	88	static HV coro_state_stash, coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV coro_mortal; / will be freed after next transfer */	89	static SV coro_mortal; / will be freed after next transfer */
91		90
92	/* this is actually not only the c stack but also c registers etc... */	91	/* this is a structure representing a c-level coroutine */
93	typedef struct {	92	typedef struct coro_stack {
94	int refcnt; /* pointer reference counter */	93	struct coro_stack *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		94
98	coro_context cctx;	95	void idle_sp; / original stacklevel when coroutine was created */
99
100	void *sptr;	96	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	97	long ssize; /* positive == mmap, otherwise malloc */
		98
		99	/* cpu state */
		100	coro_context cctx;
		101	JMPENV *top_env;
102	} coro_stack;	102	} coro_stack;
103		103
		104	/* the (fake) coro_stack representing the main program */
		105	static coro_stack *main_stack;
		106
		107	/* this is a structure representing a perl-level coroutine */
104	struct coro {	108	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	109	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;
107
108	/* the optional C context */
109	coro_stack *stack;	110	coro_stack *stack;
110	void *cursp;	111
		112	/* data associated with this coroutine (initial args) */
		113	AV *args;
111	int gencnt;	114	int refcnt;
112		115
113	/* optionally saved, might be zero */	116	/* optionally saved, might be zero */
114	AV *defav;	117	AV *defav;
115	SV *defsv;	118	SV *defsv;
116	SV *errsv;	119	SV *errsv;
…		…
146	OP **retstack;	149	OP **retstack;
147	I32 retstack_ix;	150	I32 retstack_ix;
148	I32 retstack_max;	151	I32 retstack_max;
149	PMOP *curpm;	152	PMOP *curpm;
150	COP *curcop;	153	COP *curcop;
151	JMPENV *top_env;
152		154
153	/* data associated with this coroutine (initial args) */	155	/* coro process data */
154	AV *args;	156	int prio;
155	};	157	};
156		158
157	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
159		161
…		…
302	PL_retstack_ix = c->retstack_ix;	304	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;	305	PL_retstack_max = c->retstack_max;
304	#endif	306	#endif
305	PL_curpm = c->curpm;	307	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;	308	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		309
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312		313
…		…
430	c->retstack_ix = PL_retstack_ix;	431	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;	432	c->retstack_max = PL_retstack_max;
432	#endif	433	#endif
433	c->curpm = PL_curpm;	434	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;	435	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	436	}
437		437
438	/*	438	/*
439	* allocate various perl stacks. This is an exact copy	439	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	440	* of perl.c:init_stacks, except that it uses less memory
…		…
534	Safefree (PL_retstack);	534	Safefree (PL_retstack);
535	#endif	535	#endif
536	}	536	}
537		537
538	static void	538	static void
539	allocate_stack (Coro__State ctx, int alloc)	539	setup_coro (struct coro *coro)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{
551	#if HAVE_MMAP
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{
556	# if STACKGUARD
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558	# endif
559	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569
570	ctx->stack = stack;
571	}
572
573	static void
574	deallocate_stack (Coro__State ctx)
575	{
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590
591	Safefree (stack);
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}
597
598	static void
599	setup_coro (void *arg)
600	{	540	{
601	/*	541	/*
602	* emulate part of the perl startup here.	542	* emulate part of the perl startup here.
603	*/	543	*/
604	dTHX;	544	dTHX;
605	dSP;	545	dSP;
606	Coro__State ctx = (Coro__State)arg;	546	UNOP myop;
607	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);	547	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
608		548
609	coro_init_stacks (aTHX);	549	coro_init_stacks (aTHX);
610	/PL_curcop = 0;/	550	/PL_curcop = 0;/
611	/PL_in_eval = PL_in_eval;/ /* inherit */	551	/PL_in_eval = PL_in_eval;/ /* inherit */
612	SvREFCNT_dec (GvAV (PL_defgv));	552	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	553	GvAV (PL_defgv) = coro->args; coro->args = 0;
614		554
615	SPAGAIN;	555	SPAGAIN;
616		556
617	if (ctx->stack)
618	{
619	ctx->cursp = 0;
620
621	PUSHMARK(SP);
622	PUTBACK;
623	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
624
625	if (SvTRUE (ERRSV))
626	croak (NULL);
627	else
628	croak ("FATAL: CCTXT coroutine returned!");
629	}
630	else
631	{
632	UNOP myop;
633
634	PL_op = (OP *)&myop;
635
636	Zero(&myop, 1, UNOP);	557	Zero (&myop, 1, UNOP);
637	myop.op_next = Nullop;	558	myop.op_next = Nullop;
638	myop.op_flags = OPf_WANT_VOID;	559	myop.op_flags = OPf_WANT_VOID;
639		560
		561	PL_op = (OP *)&myop;
		562
640	PUSHMARK(SP);	563	PUSHMARK(SP);
641	XPUSHs (sub_init);	564	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;	565	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;	567	SPAGAIN;
652		568
653	ENTER; /* necessary e.g. for dounwind */	569	ENTER; /* necessary e.g. for dounwind */
654	}
655	}	570	}
656		571
657	static void	572	static void
658	continue_coro (void *arg)	573	free_coro_mortal ()
659	{	574	{
660	/*
661	* this is a _very_ stripped down perl interpreter ;)
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665
666	PL_top_env = &ctx->start_env;
667
668	ctx->cursp = 0;
669	PL_op = PL_op->op_next;
670	CALLRUNOPS(aTHX);
671
672	abort ();
673	}
674
675	static void
676	transfer (pTHX_ struct coro prev, struct coro next, int flags)
677	{
678	dSTACKLEVEL;
679
680	if (prev != next)
681	{
682	if (next->mainstack)
683	{
684	LOCK;
685	SAVE (prev, flags);
686	LOAD (next);
687	UNLOCK;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}
722	else if (next->tmps_ix == -2)
723	croak ("tried to transfer to running coroutine");
724	else
725	{
726	LOCK;
727	SAVE (prev, -1); /* first get rid of the old state */
728	UNLOCK;
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}
765	}
766
767	LOCK;
768	if (coro_mortal)	575	if (coro_mortal)
769	{	576	{
770	SvREFCNT_dec (coro_mortal);	577	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	578	coro_mortal = 0;
772	}	579	}
		580	}
		581
		582	static void
		583	coro_run (void *arg)
		584	{
		585	/*
		586	* this is a _very_ stripped down perl interpreter ;)
		587	*/
		588	dTHX;
		589	PL_top_env = &PL_start_env;
		590
773	UNLOCK;	591	UNLOCK;
774	}
775		592
776	#define SV_CORO(sv,func) \	593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
777	do { \	594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
778	if (SvROK (sv)) \	595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
779	sv = SvRV (sv); \
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		596
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	597	/* somebody will hit me for both perl_run and PL_restart_op */
		598	perl_run (aTHX_ PERL_GET_CONTEXT);
798		599
		600	abort ();
		601	}
		602
		603	static coro_stack *
		604	stack_new ()
		605	{
		606	coro_stack *stack;
		607
		608	New (0, stack, 1, coro_stack);
		609
		610	#if HAVE_MMAP
		611
		612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
		613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		614
		615	if (stack->sptr == (void *)-1)
		616	{
		617	perror ("FATAL: unable to mmap stack for coroutine");
		618	_exit (EXIT_FAILURE);
		619	}
		620
		621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		622
		623	#else
		624
		625	stack->ssize = STACKSIZE * (long)sizeof (long);
		626	New (0, stack->sptr, STACKSIZE, long);
		627
		628	if (!stack->sptr)
		629	{
		630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		631	_exit (EXIT_FAILURE);
		632	}
		633
		634	#endif
		635
		636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		637
		638	return stack;
		639	}
		640
		641	static void
		642	stack_free (coro_stack *stack)
		643	{
		644	if (!stack \|\| stack == main_stack)
		645	return;
		646
		647	#if HAVE_MMAP
		648	munmap (stack->sptr, stack->ssize);
		649	#else
		650	Safefree (stack->sptr);
		651	#endif
		652
		653	Safefree (stack);
		654	}
		655
		656	static coro_stack *stack_first;
		657
		658	static coro_stack *
		659	stack_get ()
		660	{
		661	coro_stack *stack;
		662
		663	if (stack_first)
		664	{
		665	stack = stack_first;
		666	stack_first = stack->next;
		667	}
		668	else
		669	{
		670	stack = stack_new ();
		671	PL_op = PL_op->op_next;
		672	}
		673
		674	return stack;
		675	}
		676
		677	static void
		678	stack_put (coro_stack *stack)
		679	{
		680	stack->next = stack_first;
		681	stack_first = stack;
		682	}
		683
		684	/* never call directly, always through the coro_state_transfer global variable */
		685	static void
		686	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
		687	{
		688	dSTACKLEVEL;
		689
		690	/* sometimes transfer is only called to set idle_sp */
		691	if (flags == TRANSFER_SET_STACKLEVEL)
		692	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		693	else if (prev != next)
		694	{
		695	coro_stack *prev__stack;
		696
		697	LOCK;
		698
		699	if (next->mainstack)
		700	{
		701	/* coroutine already started */
		702	SAVE (prev, flags);
		703	LOAD (next);
		704	}
		705	else
		706	{
		707	/* need to start coroutine */
		708	/* first get rid of the old state */
		709	SAVE (prev, -1);
		710	/* setup coroutine call */
		711	setup_coro (next);
		712	/* need a stack */
		713	next->stack = 0;
		714	}
		715
		716	prev__stack = prev->stack;
		717
		718	/* possibly "free" the stack */
		719	if (prev__stack->idle_sp == STACKLEVEL)
		720	{
		721	stack_put (prev__stack);
		722	prev->stack = 0;
		723	}
		724
		725	if (!next->stack)
		726	next->stack = stack_get ();
		727
		728	if (prev__stack != next->stack)
		729	{
		730	prev__stack->top_env = PL_top_env;
		731	PL_top_env = next->stack->top_env;
		732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		733	}
		734
		735	free_coro_mortal ();
		736
		737	UNLOCK;
		738	}
		739	}
		740
		741	/* use this function pointer to call the above function */
		742	/* this is done to increase chances of the compiler not inlining the call */
		743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		744	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
		745
		746	struct transfer_args
		747	{
		748	struct coro prev, next;
		749	int flags;
		750	};
		751
		752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		753
		754	static void
		755	coro_state_destroy (struct coro *coro)
		756	{
		757	if (coro->refcnt--)
		758	return;
		759
		760	if (coro->mainstack && coro->mainstack != main_mainstack)
		761	{
		762	struct coro temp;
		763
		764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		765	LOAD (aTHX_ coro);
		766
		767	destroy_stacks (aTHX);
		768
		769	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		770
		771	coro->mainstack = 0;
		772	}
		773
		774	stack_free (coro->stack);
		775	SvREFCNT_dec (coro->args);
		776	Safefree (coro);
		777	}
		778
799	static void	779	static int
		780	coro_state_clear (SV sv, MAGIC mg)
		781	{
		782	struct coro coro = (struct coro )mg->mg_ptr;
		783	mg->mg_ptr = 0;
		784
		785	coro_state_destroy (coro);
		786
		787	return 0;
		788	}
		789
		790	static int
		791	coro_state_dup (MAGIC mg, CLONE_PARAMS params)
		792	{
		793	struct coro coro = (struct coro )mg->mg_ptr;
		794
		795	++coro->refcnt;
		796
		797	return 0;
		798	}
		799
		800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		801
		802	static struct coro *
		803	SvSTATE (SV *coro)
		804	{
		805	HV *stash;
		806	MAGIC *mg;
		807
		808	if (SvROK (coro))
		809	coro = SvRV (coro);
		810
		811	stash = SvSTASH (coro);
		812	if (stash != coro_stash && stash != coro_state_stash)
		813	{
		814	/* very slow, but rare, check */
		815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		816	croak ("Coro::State object required");
		817	}
		818
		819	mg = SvMAGIC (coro);
		820	assert (mg->mg_type == PERL_MAGIC_ext);
		821	return (struct coro *)mg->mg_ptr;
		822	}
		823
		824	static void
		825	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)
		826	{
		827	ta->prev = SvSTATE (prev);
		828	ta->next = SvSTATE (next);
		829	ta->flags = flags;
		830	}
		831
		832	static void
800	api_transfer(pTHX_ SV prev, SV next, int flags)	833	api_transfer (SV prev, SV next, int flags)
801	{	834	{
802	SV_CORO (prev, "Coro::transfer");	835	dTHX;
803	SV_CORO (next, "Coro::transfer");	836	struct transfer_args ta;
804		837
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	838	prepare_transfer (aTHX_ &ta, prev, next, flags);
		839	TRANSFER (ta);
806	}	840	}
807		841
808	/ Coro ******************************************************************/	842	/ Coro ******************************************************************/
809		843
810	#define PRIO_MAX 3	844	#define PRIO_MAX 3
…		…
814	#define PRIO_IDLE -3	848	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	849	#define PRIO_MIN -4
816		850
817	/* for Coro.pm */	851	/* for Coro.pm */
818	static GV coro_current, coro_idle;	852	static GV coro_current, coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	854	static int coro_nready;
821		855
822	static void	856	static void
823	coro_enq (pTHX_ SV *sv)	857	coro_enq (pTHX_ SV *sv)
824	{	858	{
825	SV **xprio;
826	int prio;	859	int prio;
827		860
828	if (SvTYPE (sv) != SVt_PVHV)	861	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");	862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830		863
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	864	prio = SvSTATE (sv)->prio;
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837		865
838	av_push (coro_ready [prio - PRIO_MIN], sv);	866	av_push (coro_ready [prio - PRIO_MIN], sv);
839	coro_nready++;	867	coro_nready++;
840	}	868	}
841		869
…		…
847	min_prio -= PRIO_MIN;	875	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	876	if (min_prio < 0)
849	min_prio = 0;	877	min_prio = 0;
850		878
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	880	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	881	{
854	coro_nready--;	882	coro_nready--;
855	return av_shift (coro_ready[prio]);	883	return av_shift (coro_ready [prio]);
856	}	884	}
857		885
858	return 0;	886	return 0;
859	}	887	}
860		888
…		…
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	898	coro_enq (aTHX_ SvREFCNT_inc (coro));
871	UNLOCK;	899	UNLOCK;
872	}	900	}
873		901
874	static void	902	static void
875	api_schedule (void)	903	prepare_schedule (aTHX_ struct transfer_args *ta)
876	{	904	{
877	dTHX;
878
879	SV prev, next;	905	SV current, prev, *next;
880		906
881	LOCK;	907	LOCK;
882		908
883	prev = SvRV (GvSV (coro_current));	909	current = GvSV (coro_current);
		910
		911	for (;;)
		912	{
		913	LOCK;
		914
884	next = coro_deq (aTHX_ PRIO_MIN);	915	next = coro_deq (aTHX_ PRIO_MIN);
885		916
886	if (!next)	917	if (next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	918	break;
		919
		920	UNLOCK;
		921
		922	{
		923	dSP;
		924
		925	ENTER;
		926	SAVETMPS;
		927
		928	PUSHMARK (SP);
		929	PUTBACK;
		930	call_sv (GvSV (coro_idle), G_DISCARD);
		931
		932	FREETMPS;
		933	LEAVE;
		934	}
		935	}
		936
		937	prev = SvRV (current);
		938	SvRV (current) = next;
888		939
889	/* free this only after the transfer */	940	/* free this only after the transfer */
		941	free_coro_mortal ();
890	coro_mortal = prev;	942	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892		943
893	SvRV (GvSV (coro_current)) = next;	944	ta->prev = SvSTATE (prev);
894		945	ta->next = SvSTATE (next);
895	SV_CORO (next, "Coro::schedule");	946	ta->flags = TRANSFER_SAVE_ALL;
896		947
897	UNLOCK;	948	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
901	}	949	}
902		950
903	static void	951	static void
904	api_cede (void)	952	prepare_cede (aTHX_ struct transfer_args *ta)
905	{	953	{
906	dTHX;
907
908	LOCK;	954	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;	956	UNLOCK;
911		957
		958	prepare_schedule (ta);
		959	}
		960
		961	static void
912	api_schedule ();	962	api_schedule (void)
		963	{
		964	dTHX;
		965	struct transfer_args ta;
		966
		967	prepare_schedule (&ta);
		968	TRANSFER (ta);
		969	}
		970
		971	static void
		972	api_cede (void)
		973	{
		974	dTHX;
		975	struct transfer_args ta;
		976
		977	prepare_cede (&ta);
		978	TRANSFER (ta);
913	}	979	}
914		980
915	MODULE = Coro::State PACKAGE = Coro::State	981	MODULE = Coro::State PACKAGE = Coro::State
916		982
917	PROTOTYPES: ENABLE	983	PROTOTYPES: DISABLE
918		984
919	BOOT:	985	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	986	{
921	#ifdef USE_ITHREADS	987	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	988	MUTEX_INIT (&coro_mutex);
923	#endif	989	#endif
924	BOOT_PAGESIZE;	990	BOOT_PAGESIZE;
925		991
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		993
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
934		997
935	main_mainstack = PL_mainstack;	998	main_mainstack = PL_mainstack;
936		999
937	coroapi.ver = CORO_API_VERSION;	1000	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1001	coroapi.transfer = api_transfer;
939	}
940		1002
941	Coro::State	1003	Newz (0, main_stack, 1, coro_stack);
942	_newprocess(args)	1004	main_stack->idle_sp = (void *)-1;
943	SV * args	1005
944	PROTOTYPE: $	1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1007	}
		1008
		1009	SV *
		1010	new (char *klass, ...)
945	CODE:	1011	CODE:
946	Coro__State coro;	1012	{
		1013	struct coro *coro;
		1014	HV *hv;
		1015	int i;
947		1016
948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1017	Newz (0, coro, 1, struct coro);
		1018	coro->args = newAV ();
952		1019
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1020	hv = newHV ();
		1021	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1023
		1024	for (i = 1; i < items; i++)
		1025	av_push (coro->args, newSVsv (ST (i)));
		1026
		1027	coro->stack = main_stack;
954	/coro->mainstack = 0; //actual work is done inside transfer /	1028	/coro->mainstack = 0; //actual work is done inside transfer /
955	/coro->stack = 0;/	1029	/coro->stack = 0;/
956		1030	}
957	/* same as JMPENV_BOOTSTRAP */
958	/* we might be able to recycle start_env, but safe is safe */
959	/Zero(&coro->start_env, 1, JMPENV);/
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962
963	RETVAL = coro;
964	OUTPUT:	1031	OUTPUT:
965	RETVAL	1032	RETVAL
966		1033
967	void	1034	void
968	transfer(prev, next, flags)	1035	transfer (...)
969	SV *prev	1036	ALIAS:
970	SV *next	1037	Coro::schedule = 1
971	int flags	1038	Coro::cede = 2
972	PROTOTYPE: @	1039	_set_stacklevel = 3
973	CODE:	1040	CODE:
974	PUTBACK;	1041	{
975	SV_CORO (next, "Coro::transfer");	1042	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1043
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1044	switch (ix)
978	SPAGAIN;	1045	{
		1046	case 0:
		1047	if (items != 3)
		1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1049
		1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1051	break;
		1052
		1053	case 1:
		1054	prepare_schedule (&ta);
		1055	break;
		1056
		1057	case 2:
		1058	prepare_cede (&ta);
		1059	break;
		1060
		1061	case 3:
		1062	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
		1063	ta.next = 0;
		1064	ta.flags = TRANSFER_SET_STACKLEVEL;
		1065	break;
		1066	}
		1067
		1068	TRANSFER (ta);
		1069	}
979		1070
980	void	1071	void
981	DESTROY(coro)	1072	_clone_state_from (SV dst, SV src)
982	Coro::State coro	1073	CODE:
983	CODE:	1074	{
		1075	struct coro *coro_src = SvSTATE (src);
984		1076
985	if (coro->mainstack && coro->mainstack != main_mainstack)	1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
986	{
987	struct coro temp;
988		1078
989	PUTBACK;	1079	++coro_src->refcnt;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
991	LOAD (aTHX_ coro);	1081	}
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005		1082
1006	void	1083	void
		1084	_nonlocal_goto (IV nextop)
		1085	CODE:
		1086	/* uuh, somebody will kill me again for this */
		1087	PL_op->op_next = INT2PTR (OP *, nextop);
		1088
		1089	void
1007	_exit(code)	1090	_exit (code)
1008	int code	1091	int code
1009	PROTOTYPE: $	1092	PROTOTYPE: $
1010	CODE:	1093	CODE:
1011	_exit (code);	1094	_exit (code);
1012		1095
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1096	MODULE = Coro::State PACKAGE = Coro::Cont
1014		1097
1015	# this is slightly dirty (should expose a c-level api)
1016
1017	void	1098	void
1018	yield(...)	1099	yield (...)
1019	PROTOTYPE: @	1100	PROTOTYPE: @
1020	CODE:	1101	CODE:
		1102	{
1021	SV *yieldstack;	1103	SV *yieldstack;
1022	SV *sv;	1104	SV *sv;
1023	AV *defav = GvAV (PL_defgv);	1105	AV *defav = GvAV (PL_defgv);
1024	struct coro prev, next;	1106	struct coro prev, next;
1025		1107
…		…
1034	av_fill (defav, items - 1);	1116	av_fill (defav, items - 1);
1035	while (items--)	1117	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));	1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037		1119
1038	sv = av_pop ((AV *)SvRV (yieldstack));	1120	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));	1121	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1040	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));	1122	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1041	SvREFCNT_dec (sv);	1123	SvREFCNT_dec (sv);
1042		1124
1043	transfer (aTHX_ prev, next, 0);	1125	coro_state_transfer (aTHX_ prev, next, 0);
		1126	}
1044		1127
1045	MODULE = Coro::State PACKAGE = Coro	1128	MODULE = Coro::State PACKAGE = Coro
1046		1129
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1130	BOOT:
1050	{	1131	{
1051	int i;	1132	int i;
		1133
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1134	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1135
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1136	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1137	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060		1142
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1145
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1072	coroapi.ready = api_ready;	1154	coroapi.ready = api_ready;
1073	coroapi.nready = &coro_nready;	1155	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1156	coroapi.current = coro_current;
1075		1157
1076	GCoroAPI = &coroapi;	1158	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1159	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1160	SvREADONLY_on (sv);
1079	}	1161	}
1080	}	1162	}
1081		1163
1082	#if !PERL_MICRO	1164	int
		1165	prio (Coro::State coro, int newprio = 0)
		1166	ALIAS:
		1167	nice = 1
		1168	CODE:
		1169	{
		1170	RETVAL = coro->prio;
		1171
		1172	if (items > 1)
		1173	{
		1174	if (ix)
		1175	newprio += coro->prio;
		1176
		1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1179
		1180	coro->prio = newprio;
		1181	}
		1182	}
1083		1183
1084	void	1184	void
1085	ready(self)	1185	ready (SV *self)
1086	SV * self
1087	PROTOTYPE: $	1186	PROTOTYPE: $
1088	CODE:	1187	CODE:
1089	api_ready (self);	1188	api_ready (self);
1090		1189
1091	#endif
1092
1093	int	1190	int
1094	nready(...)	1191	nready (...)
1095	PROTOTYPE:	1192	PROTOTYPE:
1096	CODE:	1193	CODE:
1097	RETVAL = coro_nready;	1194	RETVAL = coro_nready;
1098	OUTPUT:	1195	OUTPUT:
1099	RETVAL	1196	RETVAL
1100		1197
1101	void	1198	MODULE = Coro::State PACKAGE = Coro::AIO
1102	schedule(...)
1103	PROTOTYPE:
1104	CODE:
1105	api_schedule ();
1106		1199
1107	void
1108	cede(...)
1109	PROTOTYPE:
1110	CODE:
1111	api_cede ();
1112
1113	# and these are hacks
1114	SV *	1200	SV *
1115	_aio_get_state ()	1201	_get_state ()
1116	CODE:	1202	CODE:
1117	{	1203	{
1118	struct {	1204	struct {
1119	int errorno;	1205	int errorno;
1120	int laststype;	1206	int laststype;
…		…
1131	}	1217	}
1132	OUTPUT:	1218	OUTPUT:
1133	RETVAL	1219	RETVAL
1134		1220
1135	void	1221	void
1136	_aio_set_state (char *data_)	1222	_set_state (char *data_)
1137	PROTOTYPE: $	1223	PROTOTYPE: $
1138	CODE:	1224	CODE:
1139	{	1225	{
1140	struct {	1226	struct {
1141	int errorno;	1227	int errorno;

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Comparing Coro/Coro/State.xs (file contents): Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs. Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC